Measuring instrument



Patented Dee.v 18, 1928.

. WEBMEILLE, OF

PATENT OFFICE.

. ST. -A.UBIN, SWITZERLAND.

MEASURING INSTRUMENT.

Application am September 12, 1927, Serial No.

The present invention relates to measuring instruments and particularly to meters for water or other liquids of the type comprising a driving mechanism operated byjhe flow of the liquid and separated from t 1e indicating mechanism bK a liquid tight diaphragm. he invention as for its object to provide a water-meter of the abovementioned type in which the motion of the driving mechanism is transmitted to the indicating mechanism by means of a magnetic coupling consisting of at least two permanent magnets located on either side of the diaphragm, one of same being controlled by the driving mechanism meanwhile the other is operating the indicatin mechanism, the ma nets havin a special s ape so as to require little space.

he accompanying drawing partly illustrates by wa of example two practical embodiments 0 this invention.

Figs. 1 and 2 refer to the first form of construct-ion. Fig. 1 is a vertical section thereof taken on line V-V of Fig. 2, while Fig. 2 isa lan view.

' 26 Fig. 3 is a vertical section of the second form of construction.

, In the first embodiment according to Figs. 1 and 2 the meter casin is separated intwo chambers b the cup-shaped diaphragm 7 so within the ttom of which is pivoted the shaft 3 which operates the recordin device ofthe indicating mechanism. To t e shaft 3 is connected the collar 9 on which are screwed the two permanent magnets 11.

These magnets are cylindrically shaped, their a 919,049, and in Switzerland November 10, 1926.

cross-section comprises two annular segments of like radius a and 6 connected by one annular segment of smaller radius 0. On the shaft 2, which is propelled by a paddlewheel not shown on the drawing, is fixed a second cup 12 concentric with cup 8, on which are fastened the two magnets 13 and 14 of semi-annular cross-section. Owing to this disposition an excellent magnetic drive is obtained within a minimum of space. 15 are tapered steel plugs driven into the diaphragm in order that the conductivity of the magnetic field is not restrained since the diaphragm is preferably made of bronze.

The form of construction shown in F i 3 is similar to the preceding one, but is used to measure liquids of low pressure. Conseguently the diaphra 'm is made thinner and oes not contain steel plugs.

I claim:

In a measuring instrument for liquids comprising a driving mechanism transmitting its motion by means of a magnetic coupling to the indicating mechanism, the combination of two cylindrical magnets, of which the cross-section comprises two annular segments of like radius connected to gether by an annular segment of smaller radius, said cylindrical magnets adapted to cooperate with two magnets of semi-annular cross-section se aratcd from the said cylindrical magnets y a liquid tight diaphragm.

In testimony whereof I afiix my signature.

WERMEILLE. 

